A significant amount of nude and racy photos alleging to be of Jennifer Lawrence, Kate Upton, Ariana Grande, and other celebrities leaked online Sunday on the 4chan link, b/chan (NSFW), sending Twitter, Reddit, and some of the stars in the leaked photos into an absolute frenzy.

The 4chan post began earlier this week, with one user claiming to have a massive amount of personal celebrity nude photos and videos. The leak began Sunday and included photos of Lawrence, Upton, Avril Lavigne, Lea Michele, and McKayla Maroney, among others. The chain began on 4chan, but has now made its way to Reddit.

The pictures were allegedly the result of a massive Apple iCloud leak, which allowed access to the celebrities’ personal phones.

Jennifer Lawrence’s publicist confirmed the authenticity of her photos to E! News.

“This is a flagrant violation of privacy. The authorities have been contacted and will prosecute anyone who posts the stolen photos of Jennifer Lawrence,” Lawrence’s rep said.

Actress Mary Winstead tweeted about hers.

To those of you looking at photos I took with my husband years ago in the privacy of our home, hope you feel great about yourselves.

Not all of the pictures are nude. Some are scantily-clad or selfies of the Oscar winning actress. The user claims to have over 60 photos of her. He shared a screen capture of his desktop with rows of photos and videos.

(Photo: 4Chan)

Actress Victoria Justice denied the alleged photos authenticity.

These so called nudes of me are FAKE people. Let me nip this in the bud right now. *pun intended*